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Thread: Some gears and testing for laser-ablating and -marking ...

  1. #31
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    ... not precise/fine enough to make own coins, but good for laser-"engraving" and "drilling"

    Click image for larger version. 

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    Viktor

  2. #32
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    ... did some "surface-cleaning" tests:

    #0 -- my magnetic iron "laser-table" - https://vimeo.com/217803061

    #1 -- black coated and rusty iron part - https://vimeo.com/217803741

    #2 -- chrome plated scissors - https://vimeo.com/217805970

    #3 -- plastic cap - https://vimeo.com/217806477

    #4 -- cast aluminium part - https://vimeo.com/217806862

    #5 -- tools - https://vimeo.com/217807208

    Viktor

  3. #33
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    ... I've tested PCB-engraving with my marking laser too ...

    - engraving:

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    - first pass - removed the lacquer and some of the copper (so it would be perfect for etching too!):

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    - after 3 passes most of the copper is removed:


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    - after 5 passes all the copper and bond (and a thin sheet of ceramic) is stripped:

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    ... and a video showing the first pass and the results - https://vimeo.com/230447348

    Viktor

  4. #34
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    ... yesterday I've received a 60Watt-fiber-laser (bigger version of my 20Watt type) for testing and temporary replaced the 20W head.

    The first action was a "parameters grid" table - here a video marking it on an aluminium sheet:

    https://vimeo.com/231082792


    The result:

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    And here the same, slightly bigger, on an iron sheet:

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    This types won't mark "real colours" for their fixed pulse-width with 200ns duration ... for creating colours I'll need the "s+" types of this lasers, which can vary the pulse-width down to some nanoseconds ...

    Viktor

  5. #35
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    ... a marking laser can be of some use

    Click image for larger version. 

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    Viktor

  6. #36
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    Looks great, Viktor!

    -David
    "Help, help, I'm being repressed!"

  7. #37
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    Hi David,

    thanks! -- this "dragon-tags" are part of a serie I've designed for my sister and ordered at Shapeways - there are many other similar and different parts to mark

    This were some of the other designs:

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    ... and here the last delivery:

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    Viktor

  8. #38
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    ... tested my "4x Vitruvian Man" in 0.3mm thick brass with the 60Watt-laser too - here 2x with full power is enough for a "safe" cut ... with the 20Watt-laser it's more like 4x and slower cutting too:

    Click image for larger version. 

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    - and the left one slightly sanded:

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    Viktor

  9. #39
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    ... while waiting and out of curiosity I've opened one of the "exploded" 25Watt-pumping-diodes of a broken fiber-laser.

    The 3 diodes are OK, only the 105m output fiber is totally burnt (dark residues top left).

    Here the opened module with sketched beam paths -- the diodes are set to different heights, so their (to a horizontal line) collimated beams will form a square on the focussing lens:

    Click image for larger version. 

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    - and here an older image, showing an old 5Watt-diode (same housing size as the 25W-diode) and a more modern 9Watt-diode (much smaller!):

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    Viktor

  10. #40
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    More impressive etches and cuts, Viktor. How long are the tags and such taking to cut/etch? Is the cost/effort a viable manufacturing method if scaled up (as compared with molds or stamping) or is it just for fun?

    Quote Originally Posted by VDX View Post
    ... while waiting and out of curiosity I've opened one of the "exploded" 25Watt-pumping-diodes of a broken fiber-laser.

    The 3 diodes are OK, only the 105m output fiber is totally burnt (dark residues top left).
    So do you plan on repairing the fiber or is it cheaper to replace the unit?

    Keep up the great work!

    -David
    "Help, help, I'm being repressed!"

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